[Building Sakai] Req :- Need Terracotta server 3.7.6

[Alaa NIZAR]

Hi,

Thank you for these clarifications.

I never used terracotta with sakai. We only load balance tomcats and provide apache in front of them.

I will try to install terracotta and play around with it.

Is there any documentation to follow in confluence or other web site?

Yours,
Alaa Nizar




Sent from Samsung Mobile

-------- Original message --------
From: Aaron Zeckoski <azeckoski at unicon.net> 
Date:21/06/2014  04:23  (GMT+00:00) 
To: Alaa NIZAR <alaanizar at iihem.ac.ma>,Sakai Dev <sakai-dev at collab.sakaiproject.org> 
Cc: Robert Long <rlong at unicon.net>,"Muthusamy, Kumar" <kumar.muthusamy at pearson.com> 
Subject: Re: [Building Sakai] Req :- Need Terracotta server 3.7.6 

Alaa,
mod_jk (within Apache) is a mechanism for allowing apache webserver to
serve up content via tomcat (a java servlet container). You probably
mean mod_proxy_balancer which is a load balancer (or load sharing
proxy) that allows traffic to a single host to be shared (or balanced
between) multiple servers.

Terracotta is a distributed cache (as we are using it in Sakai) and
also a shared memory pool (called DSO) which allows for multiple JVMs
to shared a set of objects. Mostly the value here is the ability to
share cache data or JVM objects across all the servers in a cluster.

They are not the same thing and don't really have much in common
(aside from both having something to do with server clusters).

-AZ


On Fri, Jun 20, 2014 at 2:59 PM, Alaa NIZAR <alaanizar at iihem.ac.ma> wrote:
> Hello,
>
> What's the difference between using Terracotta instead of using Apache with
> mod_jk?
>
> I think they are used for the same purpose, load balancing and scalability.
>
> Correct me if I'm wrong.
>
> Thank you.
>
>
> Sent from Samsung Mobile
>
>
> -------- Original message --------
> From: Robert Long
> Date:20/06/2014 16:18 (GMT+00:00)
> To: "Muthusamy, Kumar"
> Cc: Sakai Dev
> Subject: Re: [Building Sakai] Req :- Need Terracotta server 3.7.6
>
> Kumar,
>
> Here’s a simple step-by-step to get Terracotta up and running:
>
> • Download Terracotta 3.7.6 (works with older version of ehcache, currently
> 2.6.6, in Sakai):
> http://d2zwv9pap9ylyd.cloudfront.net/terracotta-3.7.6.tar.gz
> • Get a license for the free version:
> http://terracotta.org/downloads/bigmemorymax/free
> • Untar the Terracotta files ({TERRACOTTA_DIR})
> • In the {TERRACOTTA_DIR} directory,
> • copy the license key file from #2 here
> • create a tc-config.xml file based on
> {TERRACOTTA_DIR}/config-samples/tc-config-express-reference.xml
> • sample tc-config.xml:
> https://dl.dropboxusercontent.com/u/282240/tc-config.xml
> • To start terracotta: {TERRACOTTA_DIR}/bin/start-tc-server.sh -n
> <NAME_OF_SERVER>
> • (OPTIONAL) To start the dev console monitor:
> {TERRACOTTA_DIR}/bin/dev-console.sh
>
> —Bob
>
>  ----
> Robert Long
> Software Engineer
> Technical Account Manager - Sakai
> Unicon, Inc.
>
> ----
> M.A., Instructional Technology
> Saginaw Valley State University
>
> On Jun 20, 2014, at 11:12 AM, Muthusamy, Kumar <kumar.muthusamy at pearson.com>
> wrote:
>
> Adding to the below email,
>
>  (related to  "ERROR - Client/Server Version Mismatch Error: Client Version:
> 3.7.6, Server Version: 3.7.7.  Terminating client now." )
>
> 1) I could not find any configuration file to modify the for client and
> server configuration between Terracotta server and client.
>
>
> Thanks
> Kumar
>
>
> On Thu, Jun 19, 2014 at 4:01 PM, Muthusamy, Kumar
> <kumar.muthusamy at pearson.com> wrote:
>>
>>
>> Hi All,
>>          I have applied patches of session replication (distribute cache
>> with terracota) on my sakai code base .
>>
>>  On starting up the tomcat server, i am getting below specified error,
>> also i tried to download the terracotta server 3.7.6 version and i could not
>> find it and that is why i am using 3.7.7 version. So could any one please
>> help to get the "Terracotta server 3.7.6" or any suggestion to over come
>> this issue will be great.
>>
>>  "ERROR - Client/Server Version Mismatch Error: Client Version: 3.7.6,
>> Server Version: 3.7.7.  Terminating client now."
>>
>>
>> Thanks
>> Kumar
>
>
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-- 
Aaron Zeckoski - Software Architect - http://tinyurl.com/azprofile

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